Abstract

In recent years, the tribological contact between hard solids and glass at high temperatures has been identified as a crucial aspect in emerging technical applications like e.g., precision glass molding. To optimize such tribological systems, especially, the internal transformations of the glasses need to be considered, since these can determine which kind of energy dissipation channels become relevant, when the temperature of a glass is increasing and approaching the glass transition temperature. Here, we now introduce a new tribometer specifically developed for the analysis of glasses at elevated temperatures. Using this tribometer, we characterize friction of contacts between tungsten carbide (WC) and soda lime glass as a function of temperature, while additionally PMMA was analyzed for comparison. Our experiments reveal different tribological regimes where either simple sliding, surface fracturing, or surface deformation can be identified as relevant interface processes for the tribological behavior.

Graphical Abstract

中文翻译：

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玻璃化转变温度附近的玻璃与碳化钨接触的摩擦学分析

摘要

近年来，高温下硬质固体与玻璃之间的摩擦接触已被确定为新兴技术应用（例如精密玻璃成型）中的关键方面。特别地，为了优化这种摩擦学系统，需要考虑玻璃的内部变换，因为当玻璃的温度升高并且接近玻璃化转变温度时，这些变换可以确定哪种类型的能量耗散通道变得相关。在这里，我们现在介绍一种专门为在高温下分析玻璃而开发的新型摩擦计。使用该摩擦计，我们可以表征碳化钨（WC）和钠钙玻璃之间的接触摩擦随温度的变化，同时还分析了PMMA进行比较。

图形概要